package com.study.lihan.letcode;

public class ListNode {
   public int val;
    public ListNode next;
    public ListNode() {}
   public ListNode(int val) { this.val = val; }
   public ListNode(int val, ListNode next) { this.val = val; this.next = next; }

    @Override
    public String toString() {
        return "ListNode{" +
                "val=" + val +
                ", next=" + next +
                '}';
    }
}